question about 275/70-18 toyo MT's

I have 18x10 weld rims now with 33x12.50 open country MT's now and need tires. I was looking into the 275/70-18 open country MT's which are taller and about 1.5" narrower than the 33x12.50's. My questions are...

-does anyone have pics of the 275/70's on 10" wide rims?
-with 10"-wide rims, would they throw up mud the way the 33x12.50's do?
-Does anybody have a pic with them mounted on 18x9 wheels?

Cause the lift I have requires no more that 4 5/8 backspacing which makes the tires stick out. But if I am changing from a 18x10 wheel to 18x9 with the same backspacing and the mud still continues to fly all over the truck I might as well stay with the 18x10 right.